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Proof step 5 from proof validref-okarray (previous step)

is_arraytype(st[r -- _type] .type), st[r -- _type] .type .type ≤ ty, r = jvmref ∨ st[r -- _type] .type ≤ mkarraytype(ty) ∧ ¬ junkref(str, r, st), is_array(str, r, st) ⊦ r = jvmref, okarray(r, ty, st)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 4:
is_arraytype(st[r -- _type] .type), st[r -- _type] .type .type ≤ ty, is_array(str, r, st) ⊦ r = jvmref, okarray(r, ty, st), junkref(str, r, st)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ ty0 ≤ mkarraytype(ty) ↔ is_arraytype(ty0) ∧ ty0 .type ≤ ty])]]